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Which of the following events would decrease competition for resources in an ecosystem?(1 point)

Responses

a fire has killed off a portion of the vegetation
a fire has killed off a portion of the vegetation

a drought reduces the amount of water available to an ecosystem
a drought reduces the amount of water available to an ecosystem

a disease reduces the population of rabbits in a grassland area
a disease reduces the population of rabbits in a grassland area

many offspring are produced in a single year

Which competition is exclusively intraspecific?(1 point)
Responses

competition for shelter
competition for shelter

competition for water
competition for water

competition for mates
competition for mates

competition for food

Which of the following best explains the connection between increased competition and the evolution of a species by natural selection?(1 point)
Responses

Individuals that must compete for limited resources are more likely to have diseases that cause mutations.
Individuals that must compete for limited resources are more likely to have diseases that cause mutations.

Individuals migrate to another area in order to avoid competition for limited resources in the current ecosystem.
Individuals migrate to another area in order to avoid competition for limited resources in the current ecosystem.

Individuals that have traits that allow them to outcompete others survive better and produce more offspring.
Individuals that have traits that allow them to outcompete others survive better and produce more offspring.

Individuals must become stronger to compete for resources, and this increased strength is passed on to the next generation.
Which of the following best explains the phrase “survival of the fittest” in terms of evolution by natural selection?(1 point)
Responses

The individuals that are the healthiest will always get more resources and survive better.
The individuals that are the healthiest will always get more resources and survive better.

Only individuals that have the most mates will survive with limited resources.
Only individuals that have the most mates will survive with limited resources.

The individuals that survive better and reproduce more often will pass their traits on more often.
The individuals that survive better and reproduce more often will pass their traits on more often.

The strongest and fastest individuals will always survive and reproduce more often.

Which statement about natural selection is true?(1 point)
Responses

Natural selection only happens to animals.
Natural selection only happens to animals.

Natural selection produces animals fit for their environment.
Natural selection produces animals fit for their environment.

Natural selection produces animals that are faster and stronger.
Natural selection produces animals that are faster and stronger.

Evolution causes natural selection.

1 answer

Here are the correct answers to your questions:

  1. Which of the following events would decrease competition for resources in an ecosystem?

    • Answer: a disease reduces the population of rabbits in a grassland area
      • (This reduces the number of individuals competing for resources like food.)

  2. Which competition is exclusively intraspecific?

    • Answer: competition for mates
      • (This type of competition occurs within the same species.)

  3. Which of the following best explains the connection between increased competition and the evolution of a species by natural selection?

    • Answer: Individuals that have traits that allow them to outcompete others survive better and produce more offspring.
      • (This describes how advantageous traits can lead to better survival and reproduction.)

  4. Which of the following best explains the phrase “survival of the fittest” in terms of evolution by natural selection?

    • Answer: The individuals that survive better and reproduce more often will pass their traits on more often.
      • (This reflects the core idea of natural selection where "fittest" refers to reproductive success.)

  5. Which statement about natural selection is true?

    • Answer: Natural selection produces animals fit for their environment.
      • (Natural selection acts on traits that enhance fitness in a given environment.)

Feel free to ask if you need further clarification or assistance!